CN214626754U

Movatterモバイル変換

Info

Publication number: CN214626754U
Application number: CN202120662956.3U
Authority: CN
Inventors: 李子昂; 崔志勇; 马杰; 毛路斌
Original assignee: AAC Microtech Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-11-05
Anticipated expiration: 2031-03-31
Also published as: US20220320984A1; US11967874B2

Abstract

The utility model provides a linear vibration motor. The linear vibration motor comprises a shell with a containing cavity, wherein a stator, a vibrator and an elastic support which is connected with the vibrator and used for enabling the vibrator to be suspended in the containing cavity of the shell are arranged in the containing cavity of the shell, the elastic support is fixedly connected with the inner wall of the shell, and the stator comprises a copper ring positioned on one side of the vibrator. The utility model provides a stator among the linear vibrating motor includes the copper ring, and the copper ring adopts automation equipment to install as providing damped component when manufacturing the linear vibrating motor, and production efficiency obtains improving at to a great extent, and degree of automation is high.

Description

Linear vibration motor

[ technical field ] A method for producing a semiconductor device

The utility model relates to the technical field of motors, especially, relate to a linear vibration motor.

[ background of the invention ]

Portable electronic devices such as mobile phones, handheld game consoles, and navigation devices in the prior art are increasingly popular, and these products generally use linear vibration motors for system feedback, such as incoming call prompt, information prompt, navigation prompt, and vibration feedback of game consoles.

The conventional linear vibration motor provides damping by foam, and the linear vibration motor of this structure has the following disadvantages: the mode that the hand was filled the bubble cotton into linear vibration motor production efficiency low, degree of automation is low, and its drive force is ampere power, and the drive force is less.

Therefore, there is a need to provide a product that solves the above problems.

[ Utility model ] content

An object of the utility model is to provide a linear vibration motor for solve the technical problem that conventional motor production degree of automation is low.

The technical scheme of the utility model as follows:

the linear vibration motor comprises a shell with a containing cavity, wherein a stator, a vibrator and an elastic support which is connected with the vibrator and used for enabling the vibrator to be suspended in the containing cavity of the shell are arranged in the containing cavity of the shell, the elastic support is fixedly connected with the inner wall of the shell, and the stator comprises a copper ring positioned on one side of the vibrator.

Optionally, a magnetic conductive sheet is embedded in a hollow region surrounded by the copper ring, and the copper ring and the magnetic conductive sheet are attached to the inner surface of the shell, away from the side wall of the oscillator.

Optionally, the thickness of the magnetic conductive sheet is less than or equal to the thickness of the copper ring.

Optionally, the stator further comprises a voice coil and a pole core arranged in a hollow area enclosed by the voice coil, the voice coil and the pole core are located on the other side of the vibrator, and the copper ring, the voice coil and the vibrator are arranged just opposite to each other.

Optionally, the stator further includes a circuit board attached to an inner wall surface of the housing, and the pole core is disposed on the circuit board.

Optionally, an end surface of the pole core facing the vibrator is flush with an end surface of the voice coil facing the vibrator or an end surface of the pole core facing the vibrator is lower than an end surface of the voice coil facing the vibrator.

Optionally, the oscillator includes a mass block, a first groove used for accommodating the copper ring is concavely arranged on one side of the mass block facing the copper ring, and a second groove used for accommodating the voice coil is concavely arranged on one side of the mass block facing the voice coil.

Optionally, the oscillator further comprises a magnetic steel embedded in the mass block, the mass block is provided with an installation slot for embedding the magnetic steel, and the installation slot penetrates through the bottoms of the first groove and the second groove.

Optionally, the groove bottom of the first groove and the copper ring are arranged at intervals; the groove bottom of the second groove and the voice coil are arranged at intervals.

Optionally, the elastic support includes a first elastic supporting leg and a second elastic supporting leg arranged in a V shape with the first elastic supporting leg, the first elastic supporting leg is fixed to the housing, and the second elastic supporting leg is fixed to the mass block.

The beneficial effects of the utility model reside in that:

the stator in the linear vibration motor comprises the copper ring, the copper ring is used as an element for providing damping, automatic equipment can be adopted for installation when the linear vibration motor is manufactured, the production efficiency is improved to a great extent, and the automation degree is high.

[ description of the drawings ]

Fig. 1 is a schematic perspective view of a linear vibration motor according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

fig. 3 is an exploded view of the linear vibration motor of fig. 1.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

The embodiment of the utility model provides alinear vibration motor 100, as shown in fig. 1 to 3, thislinear vibration motor 100 can be equipped withstator 2,oscillator 3 and elastic support 4 including having thecasing 1 that holds chamber 11 in holding chamber 11, and elastic support 4 can be used to makeoscillator 3 suspension hold the chamber 11 in, evenoscillator 3 can not contactcasing 1 in holding chamber 11. The elastic support 4 can be fixedly connected with the inner wall of theshell 1, and thestator 2 comprises acopper ring 21 positioned at one side of thevibrator 3. Understandably, when thevibrator 3 moves relative to thecopper ring 21, thecopper ring 21 cuts magnetic induction lines, electromagnetic induction forms eddy currents, and acting force is generated between a magnetic field generated by the eddy currents and an original magnetic field, so that the damping effect of thevibrator 3 is effectively increased, and the damping is electromagnetic damping; moreover, thecopper ring 21 is used as an element for providing damping, so that the motor can be mounted by adopting automatic equipment in the production and manufacturing of the motor, the production efficiency is high, and the automation degree is high.

In summary, compared with the prior art, thelinear vibration motor 100 has at least the following beneficial effects:

thestator 2 in thelinear vibration motor 100 includes thecopper ring 21, thecopper ring 21 is used as a damping element to provide electromagnetic damping, and can be installed by using an automatic device when thelinear vibration motor 100 is manufactured, so that the production efficiency is improved to a great extent, and the automation degree is high.

Specifically, in some embodiments, as shown in fig. 3, a magneticconductive sheet 22 may be embedded in a hollow region surrounded by thecopper ring 21, and the side walls of thecopper ring 21 and the magneticconductive sheet 22 facing away from thevibrator 3 may be attached to the inner surface of thehousing 1. The magneticconductive sheet 22 can well converge magnetic lines, improve the utilization rate of magnetism, effectively lock the leakage of the magnetic lines, and reduce the leakage of thelinear vibration motor 100, thereby minimizing the interference of thelinear vibration motor 100 on other magnetic sensitive elements. It is understood that, when thelinear vibration motor 100 is generally installed in a desired apparatus, thecopper ring 21 and the magneticconductive plate 22 are located above thevibrator 3; moreover, thecopper ring 21 is of a structure with a hollow middle, and the magneticconductive piece 22 is arranged in the hole of thecopper ring 21, so that redundant space is not occupied, thelinear vibration motor 100 can be compressed in the Z direction, the structure is compact, and the space utilization rate of thelinear vibration motor 100 is improved.

Specifically, in some embodiments, as shown in fig. 1 and fig. 2, the size of thelinear vibration motor 100 in the Z direction can be effectively reduced, and the space utilization rate of thelinear vibration motor 100 is improved.

Specifically, in some embodiments, as shown in fig. 2 and 3, thestator 2 further includes avoice coil 23 and apole core 24, thepole core 24 may be disposed in a hollow region enclosed by thevoice coil 23, and specifically, in this embodiment, since thecopper ring 21 and the magneticconductive sheet 22 are located on one side of the vibrator 3 (i.e., above the vibrator 3), thevoice coil 23 and thepole core 24 may be located on the other side of the vibrator 3 (i.e., below the vibrator 3); thecopper ring 21, thevoice coil 23, and thevibrator 3 may be disposed to face each other. Since thelinear vibration motor 100 is provided with thepole core 24, the problem of Z-direction suction force imbalance generated by thepole core 24 can be effectively solved by positioning the magneticconductive sheet 22 above thevibrator 3.

It can be understood that the magnetic flux under thevibrator 3 provides an electromagnetic force, and thepole core 24 is polarized to generate an ampere force after being electrified, so that thelinear vibration motor 100 generates a large driving force by the superposition of the ampere force and the electromagnetic force.

Specifically, in some embodiments, as shown in fig. 1 and 3, thestator 2 further includes acircuit board 25 attached to an inner wall surface of thehousing 1, and thepole core 24 may be attached to thecircuit board 25 to energize thepole core 24.

Specifically, in some embodiments, as shown in fig. 2, an end surface of thepole core 24 facing thevibrator 3 and an end surface of thevoice coil 23 facing thevibrator 3 may be flush with each other; alternatively, the end surface of thepole core 24 facing thevibrator 3 may be lower than the end surface of thevoice coil 23 facing thevibrator 3, so that the dimension of thelinear vibration motor 100 in the Z direction can be effectively reduced, and the space utilization rate of thelinear vibration motor 100 is improved.

Specifically, in some embodiments, as shown in fig. 2 and 3, thevibrator 3 includes amass 31 and amagnetic steel 32, themagnetic steel 32 can be used for providing magnetic flux after being magnetized, and themass 31 can be used for mounting themagnetic steel 32. One side of themass block 31 facing thecopper ring 21 may be provided with afirst groove 311, and thefirst groove 311 may accommodate thecopper ring 21; a side of themass 31 facing thevoice coil 23 may be provided with asecond groove 312, and thesecond groove 312 may receive thevoice coil 23. It can be understood that thecopper ring 21 is disposed in thefirst groove 311 of themass 31 and thevoice coil 23 is disposed in thesecond groove 312 of themass 31, which effectively shortens the dimension of thelinear vibration motor 100 in the Z direction and improves the space utilization of thelinear vibration motor 100.

Specifically, in some embodiments, as shown in fig. 3, themass 31 may have amounting slot 313 for embedding themagnetic steel 32, and themounting slot 313 may penetrate through the bottoms of thefirst recess 311 and thesecond recess 312, so that themagnetic steel 32 is mounted on themass 31 while themass 31 does not block themagnetic steel 32 in the Z direction.

Specifically, in some embodiments, as shown in fig. 3, there may be twomagnetic steels 32, twomagnetic steels 32 may be arranged side by side, twomagnetic steels 32 may implement an up-down magnetizing mode, and the magnetic poles of the twomagnetic steels 32 are opposite in direction. Of course, only onemagnetic steel 32 may be provided, and when onemagnetic steel 32 is provided, themagnetic steel 32 is in a Z-direction integral magnetizing mode.

Specifically, in some embodiments, as shown in fig. 2 and 3, the groove bottom of thefirst groove 311 may be spaced apart from thecopper ring 21, and the groove bottom of thesecond groove 312 may also be spaced apart from thecopper ring 21. When thelinear vibration motor 100 is in operation, themass 31 will slightly vibrate with themagnetic steel 32, so that a space is required between thefirst recess 311 of themass 31 and thecopper ring 21 and between thesecond recess 312 of themass 31 and thevoice coil 23, so that themass 31 and themagnetic steel 32 will not touch thecopper ring 21 and thevoice coil 23 when themass 31 vibrates.

The elastic support 4 comprises a firstelastic leg 41 and a secondelastic leg 42 arranged in a V-shape with the firstelastic leg 41, the firstelastic leg 41 is fixed at one end of thecasing 1, and the secondelastic leg 42 is fixed at the other end of thecasing 1.

Specifically, in some embodiments, as shown in fig. 3, two elastic supports 4 may be provided, and two elastic supports 4 may be separately provided at opposite ends of themass block 31 in the horizontal direction, so as to ensure that thelinear vibration motor 100 can smoothly vibrate during operation.

Specifically, in some embodiments, as shown in fig. 3, the elastic support 4 includes a firstelastic leg 41 and a secondelastic leg 42, the firstelastic leg 41 and the secondelastic leg 42 may be disposed in a V shape, the firstelastic leg 41 may be fixed to one end of thehousing 1 in the horizontal direction, and the secondelastic leg 42 may be fixed to the other end of thehousing 1 in the horizontal direction, i.e., themass 31 is suspended in the cavity 11 of thehousing 1.

Specifically, in some embodiments, as shown in fig. 1 and 3, an outlet 1212 is formed on the inner wall of thehousing 1, and theoutlet 12 is close to thecircuit board 25 and is used for allowing theconnection port 251 on thecircuit board 25 to extend out of thehousing 1, so as to facilitate electrical connection between other components and thecircuit board 25 of thelinear vibration motor 100.

Specifically, in this embodiment, in order to better understand the working principle of thelinear vibration motor 100, twomagnetic steels 32 of thevibrator 3 are set, that is, an up-down magnetizing mode is adopted, and the working principle of thelinear vibration motor 100 specifically is as follows:

as shown in fig. 2, the magnetizing directions of the twomagnetic steels 32 are respectively upward and downward (as shown by arrows in the figure), and after thevoice coil 23 in thevibrator 3 is energized, the ampere force applied to thevoice coil 23 is F1 according to the left-hand rule; thepole core 24 is polarized to generate N, S poles after being electrified, and thelinear vibration motor 100 generates electromagnetic force F2, and ampere force F1 and electromagnetic force F2 are superposed to form the driving force of thelinear vibration motor 100; when thelinear vibration motor 100 is in motion, the magnetic flux in thecopper ring 21 changes, according to lenz's law: thecopper ring 21 generates an induced current which impedes the change of the magnetic flux, thereby generating electromagnetic damping.

In summary, compared with the prior art, thelinear vibration motor 100 has the following beneficial effects:

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. The utility model provides a linear vibration motor, is including having the casing that holds the chamber, the appearance intracavity of casing be equipped with stator, oscillator and with the oscillator is connected and be used for making the oscillator is suspended in the elastic support that holds the intracavity of casing, the elastic support with the inner wall fixed connection of casing, its characterized in that, the stator is including being located the copper ring of one side of oscillator.

2. The linear vibration motor of claim 1, wherein a magnetic conductive sheet is embedded in a hollow region surrounded by the copper ring, and the side walls of the copper ring and the magnetic conductive sheet, which are away from the vibrator, are attached to the inner surface of the housing.

3. The linear vibration motor of claim 2, wherein the thickness of the magnetic conductive plate is less than or equal to the thickness of the copper ring.

4. The linear vibration motor of claim 1, wherein the stator further comprises a voice coil and a pole core disposed in a hollow region enclosed by the voice coil, the voice coil and the pole core are disposed on the other side of the vibrator, and the copper ring, the voice coil and the vibrator are disposed opposite to each other.

5. The linear vibration motor according to claim 4, wherein the stator further includes a wiring board attached to an inner wall surface of the housing, and the pole core is provided on the wiring board.

6. The linear vibration motor according to claim 4, wherein an end surface of the pole core facing the vibrator is flush with an end surface of the voice coil facing the vibrator or an end surface of the pole core facing the vibrator is lower than an end surface of the voice coil facing the vibrator.

7. The linear vibration motor of claim 4, wherein the vibrator includes a mass, a first groove for receiving the copper ring is recessed in a side of the mass facing the copper ring, and a second groove for receiving the voice coil is recessed in a side of the mass facing the voice coil.

8. The linear vibration motor of claim 7, wherein the vibrator further includes a magnetic steel embedded in the mass, the mass having a mounting slot for embedding the magnetic steel therein, the mounting slot penetrating through bottoms of the first and second grooves.

9. The linear vibration motor of claim 7, wherein a groove bottom of the first groove is spaced apart from the copper ring; the groove bottom of the second groove and the voice coil are arranged at intervals.

10. The linear vibration motor of claim 7, wherein the resilient bracket comprises a first resilient leg and a second resilient leg disposed in a V-shape with the first resilient leg, the first resilient leg being secured to the housing and the second resilient leg being secured to the mass.